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Method for preparing polyurethane function material with surface modified by polyvinyl pyrrolidone

A technology of polyvinylpyrrolidone and functional materials, which is applied in the field of preparation of hydrophilic coatings, can solve problems such as easy peeling off of coatings, failure to apply and popularize, etc., achieves the effect of simple production process and improved surface hydrophilicity

Inactive Publication Date: 2010-07-28
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In China, some of the samples with lubricating coatings studied have the main problem that the coatings are easy to fall off and cannot be widely used and promoted.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1) Preparation of polyvinylpyrrolidone (Init-PVP-N 3 ): first purify N-vinylpyrrolidone by vacuum distillation to remove the polymerization inhibitor. Under nitrogen protection, 0.135g (0.94mmol) cuprous bromide (CuBr) 0.39mL (1.88mmol) N, N, N', N", N"'-pentamethyldiethylenetriamine (PMDETA ) and 10mL (0.094mol) of N-vinylpyrrolidone were added to a 50mL three-neck round bottom flask equipped with a reflux condenser, and continuously stirred with a magnetic stirrer, and then the initiator 2-bromoisobutyric acid (1.57 g, 0.0094mol), heated to 90°C and refluxed for 72 hours. After the reaction, cool to room temperature, pour the reaction mixture in the flask into a 100mL acetic acid solution, filter, and rinse with excess deionized water successively, and vacuum dry to obtain polyvinylpyrrolidone (Init- PVP-Br). Take 0.130g (~0.04mmol) of bromine-terminated polyvinylpyrrolidone (Init-PVP-Br) obtained above and 0.163g (2.50mmol) of sodium azide (NaN 3 ) was dissolved ...

Embodiment 2

[0037] 1) Preparation of polyvinylpyrrolidone (Init-PVP-N3 ): first purify N-vinylpyrrolidone by vacuum distillation to remove the polymerization inhibitor. Under nitrogen protection, 0.135g (0.94mmol) cuprous bromide (CuBr) 0.39mL (1.88mmol) N, N, N', N", N"'-pentamethyldiethylenetriamine (PMDETA ) and 10mL (0.094mol) of N-vinylpyrrolidone were added to a 50mL three-neck round bottom flask equipped with a reflux condenser, and continuously stirred with a magnetic stirrer, and then the initiator 2-bromoisobutyric acid (1.57 g, 0.0094mol), heated to 90°C and refluxed for 72 hours. After the reaction, cool to room temperature, pour the reaction mixture in the flask into a 100mL acetic acid solution, filter, and rinse with excess deionized water successively, and vacuum dry to obtain polyvinylpyrrolidone (Init- PVP-Br). Take 0.130g (~0.04mmol) of bromine-terminated polyvinylpyrrolidone (Init-PVP-Br) obtained above and 0.163g (2.50mmol) of sodium azide (NaN 3 ) was dissolved in...

Embodiment 3

[0041] 1) Preparation of polyvinylpyrrolidone (Init-PVP-N 3 ): first purify N-vinylpyrrolidone by vacuum distillation to remove the polymerization inhibitor. Under nitrogen protection, 0.135g (0.94mmol) cuprous bromide (CuBr) 0.39mL (1.88mmol) N, N, N', N", N"'-pentamethyldiethylenetriamine (PMDETA ) and 10mL (0.094mol) of N-vinylpyrrolidone were added to a 50mL three-neck round bottom flask equipped with a reflux condenser, and continuously stirred with a magnetic stirrer, and then the initiator 2-bromoisobutyric acid (1.57 g, 0.0094mol), heated to 90°C and refluxed for 72 hours. After the reaction, cool to room temperature, pour the reaction mixture in the flask into a 100mL acetic acid solution, filter, and rinse with excess deionized water successively, and vacuum dry to obtain polyvinylpyrrolidone (Init- PVP-Br). Take 0.130g (~0.04mmol) of bromine-terminated polyvinylpyrrolidone (Init-PVP-Br) obtained above and 0.163g (2.50mmol) of sodium azide (NaN 3 ) was dissolved ...

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Abstract

The invention relates to a method in which atom transfer radical polymerization (ATRP) and 'click' mistry are comprehensively utilized to improve surface hydrophilism of the polyurethane material, specifically, polyvinyl pyrrolidone is grafted on the surface of the polyurethane material to obtain surface functional polyurethane material. The invention aims to provide a simple and practical method for modifying the polyurethane surface and obtaining required high-degree wettability. The method comprises the following steps: first, vinyl pyrrolidone monomer is polymerized to obtain polyvinyl pyrrolidone (Init-PVP-X, X=CI, Br) with a terminal group thereof being halogen atom through the atom transfer radical polymerization reaction, then sodium azide is employed to convert the terminal group of the polyvinyl pyrrolidone from chlorine or bromine to triazon. with the method of the invention, surface hydrophily of high polymer material polyurethane with excellent mechanical properties can be noticeably improved and the question that the PVP combines with polyurethane is solved, so that a novel polyurethane function material featuring simple technology and economy and practicability is formed.

Description

technical field [0001] The invention belongs to the field of surface functionalization of medical polymer materials, and specifically relates to a method for preparing a highly stable hydrophilic coating on the surface of medical polyurethane materials such as high-end medical catheters, guide wires and cardiovascular stents. Background technique [0002] Polyurethane (polyurethanes, PU) is mainly obtained by polyaddition of diisocyanate and diol or polyol as the basic raw material. It was first synthesized by Bayer in 1947 and has a development history of more than 60 years [1]. PU main chain The diversity of structure determines that it has very rich and unique physical and chemical properties. Surface functionalized PU has been widely used as biomedical materials. Polyethylene glycol (PEG) or heparin can enhance the hydrophilic lubricity of the catheter surface, anticoagulant and anti-protein deposition, and can be applied to the blood vessels of patients. The prerequisit...

Claims

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Application Information

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IPC IPC(8): C08G81/02C08G18/83C08F126/10C08F8/30
Inventor 张天柱薛云燕江筱莉周雪锋顾宁
Owner SOUTHEAST UNIV
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